Seiko Cal. 5631 - 304

The Seiko 5631-304 represents an important milestone in Seiko's 1992 lineup. It features a Navy dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-cc982b2da916]

Also known as: Sumo, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

14.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1992

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